omp, more threads more slowly
recently, i transplant a program to mic i just add a omp pragma, but more threads more slowlyschedule, i tried auto, "guide, 10", "static, 10" one thread needs 4minus, 2threads needs 6minus, ,,240...
View Articleasynchronous data transfer format
Hey again everyone,I am attempting to do an asynchronous data transfer. I want to start data transfer, simultanesouly run stuff on the host, once host computation and data transfer is over run another...
View Articlewarning #3335: *MIC* offload features on this platform currently require that...
HiI am trying to compile a parallel linear solver library that offloads to Xeon Phi, but in the process of doing so I may have run into a showstopper . I compile it using the latest version of parallel...
View ArticleIs it possible to extend the memory of MIC?
Hi,We are using 5110P model which has 8GB on board memory. We have some applications that require more memory than the MIC card has. If the application use up the 8GB on board memory, the system will...
View ArticleInstalled MPSS with ofed 1.5.4.1 support, not able to get access to xeon...
I installed mpss 3.3 with ofed 1.5.4.1 on my 5110p based server. IB is mlx_4. Node IB is working fine. I am able to login to a remote xeon phi using external bridging support. I am running these...
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How to debug offload application using GDB
Hi,i want to debug my application using gdb in offload mode. Unfortunately i could not find exact way to debug an offload application using GDB. This...
View ArticleOffloading MKL C FFT functions from Java
Hello,Can someone point me to any examples of offloading C functions from java to MIC? I am trying to offload MKL DFTI functions from java. Any help or resources would be welcome. Just to clarify, I am...
View ArticleOffload SegFault
I'm trying to run a simple offload example performing a matrix-matrix multiplication from http://www.prace-ri.eu/IMG/pdf/Best-Practice-Guide-Intel-Xeon-Phi.pdf, but I'm running into a segmentation...
View ArticleNo Mic cards found
So I recently did a clean install of RHEL 6.5 and am trying to install MPSS 3.3 on my MIC card, but am running into some issues.I've been following the readme.txt in mpss-3.3/docs/, so in step one,...
View ArticleCode Generation for future Intel® MIC Architecture-based Processors
In versions 14.0.1 and later, the Intel® C++ Compiler and the Intel® Fortran Compiler processor-specific options support code generation for Intel® Advanced Vector Extensions 512 (Intel® AVX-512)...
View ArticleHow many MICs per host is possible?
Dear all,What are the limits to placing Xeon Phis in a single host machine? E.g. If I wanted to put 8 5110p or 7120p devices in a single 4U server, are there any major problems with doing this?Best...
View ArticleXML list of opcodes map
Hi , Is there a complete list of opcodes map sorted in a database or xml file ?Best regards,Mahdi.
View ArticleHow many bits are required to support arbitrary shuffle operations?
Hi all,Recently, I have some doubts about why the support of arbitrary shuffle operations is impractical while reading the "Intel Xeon Phi Coprocessor System Software Developers Guide" (link:...
View ArticleFFTW wrapper on MIC
Hi everyone,I'm trying to run the MKL fftw wrapper on MIC, but it doesn't work. The code compiles and I can run the binary, but since I don't have the offload report I guess that code don't was really...
View Articlecompiler warning and no report
I use intel xeon phi. Hence I use ICC and ICPC to compile. I use the corresponding flagsCMAKE_CXX_FLAGS:STRING=-mmic -vec-report -I/opt/intel/include/mic -Wl,-rpath,/home/snataraj/lib/zlib-1.2.8...
View ArticleDisable HW prefetch in mic
Does –no-opt-prefetch disable hw prefetch too? If, no...how to disable HW prefetch?
View ArticleOpenCL support for C++ template
Hi,I'm trying to port an OpenCL kernel that contains C++ template declarations. The compilation of the kernel code (with clCreateProgramWithSource) fails because it does not recognise the "template"...
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Состояния управления электропитанием: P-состояния, C-состояния и пакетные...
(Вы можете скачать PDF-версию этой статьи во вложении.)СодержаниеПредисловие. Что, почему и откуда? 1Глава 1: Введение. 2Глава 2: P-состояния, Снижение энергопотребления без ущерба для...
View ArticleMIC-AVX512 and -mmic
Hi, I am trying to understand STREAM performance in Add and Triad on Phi, where with 240 threads I seeFunction Best Rate MB/s Avg time Min time Max time Copy: 157971.2...
View ArticleProblem rebuilding MPSS-3.3 RPMs for a later RHEL kernel
This is only a fractionally later kernel than the one the pre-packaged software comes compiled for, so you'd think it would compile straight off. Unfortunately everything is made more complicated by...
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